Add-On Attach Rate — The Metric That Turns Visits Into Revenue
Part 5 of The Numbers That Matter — a series on the metrics that actually move the needle for clubs.
Every time a member checks in, there's a window — maybe 30 seconds, maybe two minutes — where they're standing at the desk, already committed to spending money, and open to spending a little more. A towel upgrade, a drink, a locker add-on, whatever you offer.
Add-on attach rate tells you how often that window converts. What percentage of visits include at least one add-on purchase? And when members do buy, what's the average spend?
Most clubs have no idea what this number is. They know what they sold in total. They don't know how many visits could have included an add-on but didn't. That gap is where a surprising amount of revenue hides.
Why this deserves its own metric
If you read the Revenue Per Visit post in this series, you know RPV captures the full economic picture of a visit. So why break out add-ons separately?
Because add-ons are the most controllable lever in your RPV. You can't easily change your admission price every week. Room rental rates are somewhat fixed by your space and market. But your add-on mix, your pricing, how you display options, and how your front desk presents them — all of that is tunable, testable, and improvable on a short cycle. Attach rate is the feedback loop that tells you if your changes are working.
So what can you do with this number?
Figure out if you have a product problem or a presentation problem. A low attach rate with a decent average add-on spend means the people who buy, buy well — you just need more of them buying. That's usually a presentation or workflow issue at the front desk. A high attach rate but low average spend means people are willing to add on, but your product mix isn't giving them anything worth reaching for. Same metric, different diagnosis.
Test front desk scripts. Give your Hosts a specific way to mention add-ons at check-in for one week. Measure the attach rate before and after. This is the simplest A/B test in your business and it costs nothing. "Can I add a towel and water for you?" versus not mentioning it at all can swing attach rate by double digits. You can't know that without the number.
Identify which add-ons are carrying the category. If your attach rate is 40% but it's the same two products every time, you don't have a healthy add-on program — you have two popular products and a bunch of shelf warmers. Break attach rate down by product and you'll see what to double down on, what to rethink, and what to drop.
Time your offers. Attach rate at check-in might be 35%, but what about mid-visit? If members could order something to their room — a drink, a snack, a product — your attach window expands from that one moment at the desk to the entire visit duration. Tracking when add-ons are purchased during a visit tells you if there's an untapped mid-visit demand you're not serving.
Build bundle pricing. Once you know which add-ons get purchased together frequently, you can bundle them. "Room + towel + water for $X" isn't a guess anymore — it's based on actual purchasing patterns. Bundles increase perceived value for the member and increase attach rate for you. But you need the data to know which bundles make sense.
Reward your Hosts. If you can see attach rate by shift or by Host, you can recognize and reward the people who are great at natural upselling. Not in a pushy way — in a "this person makes members feel taken care of and it shows in the numbers" way. The best Hosts don't sell add-ons. They recommend them. Attach rate tells you who's doing it well.
What "good" looks like
There's no universal benchmark for club add-on attach rates because nobody's been tracking it. But from running my own operation, I can tell you that getting from "we don't measure this" to even a consistent 30-40% attach rate with a modest average spend can meaningfully change your monthly revenue without changing a single price or adding a single member. It's pure upside from your existing traffic.
Why this is hard to track today
You need every add-on purchase tied to the visit it happened during — not just a line item on a register tape. Most POS systems can tell you "we sold 47 towels today" but can't tell you "47 of our 120 visits today included a towel purchase." That distinction is the difference between an inventory report and an attach rate.
At Clerb, every purchase is linked to the visit and the member. Attach rate calculations, product-level breakdowns, and per-Host performance are natural outputs of how the system tracks visits — because understanding what happens during a visit is the whole point.
Curious how this actually works under the hood? See the technical breakdown →
What would you do with this number?
What's the add-on strategy you'd build if you could see your attach rate clearly? New products, better front desk scripts, mid-visit ordering, bundles? I'd love to hear what's worked at your club — or what you've been wanting to try. Comments are open.
This is Part 5 of The Numbers That Matter. Next up: Room Turnover Time — the operational bottleneck quietly capping your capacity on the busiest nights.
Have a metric you want us to dig into? Reach out at @getclerb.